Apparatus for twisting and winding



Aug. 27, 1957 Filed June 17, 1954 c. A. STEELE 2,803,939

APPARATUS FOR TWISTING AND WINDING mur-I mama g mllllilllll mm mi;

5 Snets-Sheet l WWI i g i IIIIIIIW INVENTOR. CARLTON A. STEELE ATTORNEYjWfD Aug. 27, 1957 Filed June 17, 1954 C. A. STEELE Sheets-Sheet 2 I22{2Q m us. '26 14! :21 73 1/9 5/ 72 l 52 O 56 f 1 77 J 6/ j, :12 1% 59 as46 Y I70 4/ 9 4/ I68 3 r I67 43 4a 44 I I64 I66 74 I 33 54 y T 11 77- p,42 3/ 32 05 a 35 i I78 177 I g I89 is t 19/ gig I59 25 I INVENTOR. Fi -2F1 -I2 CARLTON A. STEELE ATTORNE Y Aug. 27, 1957 STEELE 2,803,939

APPARATUS FOR TWISTING AND WINDING Filed June 17, 1954 5 Sneets-Sheet 3ummm n nu

INVENTOR. C RLTO A. STEELE F 5 A T TORNE Y Aug. 27, 1957 c. A. STEELE2,803,939

APPARATUS FOR TWISTING AND WINDING Filed June 17, 1954 5 Sneets-Sheet 4INVENTOR.

CARLTON A. STEELE ATTORNEY A 27, 1957 c. A. STEELE 2,803,939

APPARATUS FOR TWISTING AND WINDING Filed June 17, 1954 5 Sneets-Sheet 5as es 57 HZ I03 [05 l "4 3% m L 83 84 98 II 95 1 1 loo I 88 I02 85INVENTOR.

CARLTON A. swam:

F1 .8 BY

A TTORNE Y United States l atent O APPARATUS FOR TWISTING AND WINDINGCarlton A. Steele, Warwick, R. 1., assignor to Universal WindingCompany, Cranston, R. 1., a corporation of Massachusetts ApplicationJune 17, 1954, Serial No. 437,511

9'Claims. (Cl. 57-5865) The present invention relates to winding andtwisting ,apparatusand more particularly relates to an apparatus adaptedto Wind a strand of material at a constant speed and to' impart auniform twist to the material being wound.

Inthe present specification and claims, the term yarn is usedin ageneral sense to indicate any type of attenuated material, and the wordpackage is intended to designate thewound mass of yarn whatever its formor shape.

The co-pending application of Dimitri G. Soussloff, Carlton A. Steeleand Raymond V. Tata, Serial No. 138,038 filed January 11, 1950 forMethod of and Apparatus for Twisting and Winding, now Patent No.2,715,308, discloses and claims a multiple twist spindle adapted to winda strand of yarn at a constant speed and to impart auniforrn twist tothe yarn being wound. The spindle disclosed in said application SerialNo. 138,038 is designed primarily for use as a take-up for a continuousprocess synthetic yarn spinning machine and, therefore, is provided withmeans for automatically threading a continuously advancing strand ofyarn through the spindle in a very rapid manner so that the twisting andwinding operation can be initiated without accumulating any slack yarn.

The spindle of said application Serial No. 138,038 is provided withmeans driven by a jet of compressed air for initially winding therunning strand of yarn' until the spindle. gets up to its operatingspeed. The jet of compressed air also functions to draw the runningstrand of yarn into the spindle and to direct it onto the winding arbor.The mechanism incorporated in the apparatus of said application SerialNo. 138,038 for Winding the initial run of yarn required a jet of airintroduced thereto under a pressure of from 40 to 60 poundspersquarein'ch, whereas the threading operation could be accomplished by ajet of air operating, under a pressure of from 3 to 10 pounds per squareinch. The need for relatively high pressure air tooperate the initialwinding function necessitated costly and space consuming air compressorswhich in turn involve a considerable operating expense.

One objectof the present invention is to provide a multiple twistspindle capable of twisting and winding a strand of yarn, said spindlebeing provided with means for winding said strand of yarn until suchtime as the spindle has attained its predetermined operating speed.

Another object of the present invention is to provide a multiple twistspindle capable of twisting and winding a strand of yarn, said spindlebeing provided with an auxiliary motor for driving the winding meansuntil such time as the spindledriving motor is up to its predeterminedoperating speed.

Another object of the present invention is to provide a multiple twistspindle capable of twisting and winding a strand of yarn, said'spindlebeing provided with low pressure pneumatic means for threading saidstrand of yarn into the spindle and having means independent of thepneumatic means for winding said strand of yarn until and will in partappear hereinafter.

The invention accordingly comprises the apparatus possessing theconstruction, combination of elements and arrangement of parts, whichare exemplified in the following detailed disclosure, and the scope ofthe application of which will be indicated in the claims.

For afuller understanding of the nature and objects of the inventionreference should be had to the following detailed description taken inconnection with the accompanyingdrawings wherein:

Fig. l is a side elevation of the apparatus of the present.

invention;

Fig. 2 is an-enlarged front sectional view of the spindle: of thepresent invention showing the supplementary drive for operatingthewinding mechanism while the spindle is coming up to speed;

Fig. 3 is a rear elevation of the winding mechanism of the presentinvention;

Fig. 4 is a plan view of the spindle of the present invention with someparts in section;

Fig. 5 is a horizontal sectional view taken along the line VV of Fig. 3;

Fig. 6 is a detailed elevational view showing the drive for the ribbonbreaker;

Fig. 7 is a view taken on the line VII-VII of Fig. 8;

Fig. 8 is a sectional view taken on the line VIBE-VIII of Fig. 6;

Fig. 9 is aview showing details of the threading tube;

Fig. 10 is a view showing details of the furnishing wheel;

Fig. 11 is a view showing details of the auxiliary thread guide forguiding the initial run of yarn onto a waste roller and subsequentthereto winding a transfer-tail and releasing theyarn for engagement bythe traverse yarn guide; and

Fig. 12 is a detailed elevational view, with some parts in section,showing the motor for winding the initial run of yarn until the spindleattains its operating speed and the braking means for that motor.

The present invention comprises an apparatus for twisting yarn andwinding the yarn twisted into a self supporting package, and moreparticularly comprises a multiple twist spindle of the type wherein twoturns of twist are imparted to the yarn being twisted for every singlerevolution of the spindle and the yarn thus twisted is wound into apackage inside of the balloon generated by the yarn as it is twisted.The apparatus is particularly adapted for use with continuous processspinning machinery in the manufacture of synthetic yarns. However, itwill be obvious to those skilled in the art that the device wizl havemany other applications and it is not intended to limit the inventionfor use with continuous process spinning equipment.

The above mentioned application Serial No. 138,038 discloses and claimsa multiple twist spindle adapted to wind a self supporting packageinside a balloon generated by the yarn as itis twisted. The disclosedapparatus is provided with a hollow spindle that is adapted to functionas an injector to thread a strand of yarn through the apparatus. Asupplemental winding cylinder is also provided in the apparatus to windthe initial run of yarn until such time as the spindle attains itspredetermined desired speed and, therefore, is imparting thepredetermined desired twist to the yarn. The supplemental windingcylinder is so constructed and arranged that the blast of air whichthreads the spindle also rotates said supplemental winding cylinder.

The present invention provides an improvement over the apparatus ofapplication Serial No. 138,038 in that a supplementary driving means isprovided to drive the winding portion of the present apparatus until thespindle comes up to speed thus eliminating the need for high pressureair during the threading and starting operation. The supplementarymechanism comprises a separate electric motor that operates a magneticcoupling to rotate the winding portion of the present apparatus. Thesupplementary drive is connected to the winding mechanism through anover-running clutch so that when the main spindle motor and twistingspindle is up to speed it can take over the drive of the windingmechanism and the supplementary drive can be stopped.

Referring now to the drawings, there is disclosed at Fig. l a preferredembodiment of the invention comprising the twisting and winding spindlefill mounted upon bed 12 carried by framework 13. An upright post 14 issecured to framework 13 and extends upwardly above spindle It}. Apig-tail guide 15 is secured to post 14 in axial alignment with spindleIt) by means of mounting bracket 16. The uppermost end of post 14carries forwardly extending arm 17 that has guide roller 13 rotatablysecured to its forward end. Segment 21 is pivotally mounted on arm 17adjacent upright 14 by means of pivot pin 22. compensator arm 23 isfixedly secured to segment 21 and extends upwardly past arm 17 and hasguide roller 24 rotatably journaled on its free end. Strand of yarn Y,to be twisted and Wound by spindle In, first passes around roller 24.1then around roller 18 through pig-tail 15 and into spindle it Segment 21has one end of flexible tape 25 secured thereto. Tape 25 extendsdownwardly and has its other end connected to the motor speed controlmechanism 26, to be explained more in detail hereinafter, so thatmovement of compensator arm 23 in response to tension changes in strandof yarn Y will actuate said speed control mechanism to slow spindle 10down when the tension exceeds a predetermined value and to speed saidspindle up when the tension is less than said predetermined value.

Spindle iii is preferably driven by a high slip induction motor lid. Theshaft 31 of motor 39, see Fig. 2, extends therethrough and forms thetwisting spindle of the present apparatus and also drives its windingmechanism. Shaft or spindle 31 is provided with a bore which extendsaxially throughout its length and is divided into two sections havingdifferent diameters. The diameter of lower bore section 3?. is smallerthan the diameter of upper bore section 33 to create a suction throughbore 43 in fiyer A), to be explained hereinafter, when a stream of airis passed through said spindle. The two bore sections 32 and 33 cometogether at a point above the top of motor 36 to form an outwardlyfacing annular shoulder. Motor 3t? is mounted on bed 12 by means offlange 34,, which forms part of its housing. Resilient vibrationisolating block are preferably interposed between flange 34 and bed l1.and around spindle securing bolts 36.

A disc-like fiyer ill, formed from a non-magnetic material, and havingan upstanding circumferential flange ii is mounted on, and concentricwith, spindle 31 around the annular shoulder formed by the juncture ofbore sections 33. and Flyer an is secured to spindle 31 for rotationthereby by means of fiyer hub which engages the spindle and i keyedthereto. A radial bore 4 in fiyer communicates with a radial hole aboveand adjacent the shoulder in the bore of said spindle to thereby providea yarn pasage from the periphery of flyer it? into the bore of spindle331.

A platform for supporting the package being wound and mechanism forwinding the package is carried by spindle 31 within the circumferentialconfines of flange 41 by means of bearings 47. Bearings 47 are held inaxial opening 4-8 in platform 46 by means of retaining ring 49.Cylindrical guard 51 is fixedly attached to platform 4-6 at itsperiphery and functions to prevent the yarn being twisted from catchingon the take-up mechanism should the balloon be constricted momentarilyfor any reason. A plurality of magnets 54 are spaced around motormounting flange 34 with their pole pieces located closei adjacent thelower surface of fiyer 40. A plurality of magnets 55 are fixed to andspaced around the lower side of platform 46 with their opposite polepieces in opposition to the poles of magnets 54 whereby the magneticflux from magnets 54 and 55 cooperate to prevent platform from rotatingwith spindle 31.

A frame 56, adapted to support the components which cooperate to wind aself-supporting package of yarn is mounted on the upper surface ofplatform 46. Frame 56, see Figs. 2, 3 and 5, is preferably a castingcomprising left-hand wall 57, right-hand wall 58, intermediatewall 5%,rear-wall 6t) and front-wall 61. Left and righthand walls 57 and 58respectively extend rearwardly past rear-wall 6d and have plate 63secured thereto by means of screws 64-. A top-wall 62 bridges walls 57and 59 and the extensions of walls 57 and 58 to enclose the drivingmechanism hereinafter described while leaving the axis of platform 46and spindle 31 open for the passage of the strand of yarn Y in themanner to become apparent hereinafter.

A vertical shaft 66, Figs. 2 and 5, having its lower end journaled inplatform 46 by means of suitable bearings and its upper end journaled intop wall 62, is rotated by means of pulleys a7 and 68 carried by shaft66 and spindie 31 respectively and belt 69. A horizontal shaft 71 isrotatably journaled in front-wall 61 and plate 63 adjacent verticalshaft 65;. The upper end of shaft 66 is provided with a Worm 72 which ismeshed with worm wheel 71% carried by shaft "ill. Shaft 71 projectsbeyond plate 63 and has pulley 74 mounted on the end thus projectingpast said plate, the function of pulley 74 will be explained in detailhereinafter. A bevel gear 75 is carried by shaft 71 adjacent worm wheel73 and is meshed with bevel gear '76 carried by shaft 77 which in turnis journaled in intermediate wall 59. A furnishing or godet wheel 73,Fig. 10, cornprisin a pair of discs having interlaced radial fingers 79and 8t) is secured to the free end of shaft '77 for rotation therewithand functions to engage the yarn being twisted and wound to relieve thetension therein in a manner that will become more apparent hereinafter.V

A ribbon breaking drive for the winder traverse mechanism and a drivefor the auxiliary transfer-tail winding guide (see Figs. 6, 7 and 8) ismounted on plate 63. A pinion gear 33 is fixed to shaft 71 adjacent theinner face of plate 63. Pinion $3 meshes with gear 84 that is fixed tohorizontal shaft 85. Shaft 85 has one of its ends journaled in plate 63and has its other end journaled in support plate 86 that is spacedinwardly from plate 63 by means of bosses 8'7 and is held thereon bymeans of screws 88. Shaft 85 extends inwardly past support plate 86 andhas pinion S9 fixed to this inwardly projecting end. A stub shaft 9%} isfixed to the inner surface of support plate 86 and has gears 91 and 92rotatably mounted thereon. Gear 91 is meshed with and driven by gear 89and gear 92, which is secured to gear 91, is meshed with and drives gear95. Gear 93 is rotatably journaled in support plate 86 by means of anenlarged drum-like hub 94 that is journaled in said support plate. Acrank pin 95, the purpose of which will become apparent hereinafter, isfixed to the outer surface of drum-like hub 94. A gear supporting framecomprising two arcuate segments 98 and 99 is journaled between plate 63and support plate 86 by means of bosses filth and till. A short shaft102 is fixed in boss and carries gear 103 which is meshed with anddriven by gear 84. A pin 104 is fixed between segments 98 and 99 and haswide gear 105 mounted thereon and meshed with gear 103 and with widegear 106 journaled on pin 1117 also carried by segments 98 and 99. Shortshaft 198 is journaled in boss 101 and has gear 109 fixed'to itsinnerend and meshed with and driven by wide gear 106. Pulley 110 isfixed to the outer end of shaft 108. A link 111 is pivoted at one of itsends to crank pin 95. The other end of link 11 1 ispivotally attached tosegment 98 by means of screw 112. Short shaft 113 is journaled in plate63 in axial alignment with gear 93 and drum-like hub 94. The innermostend of shaft 113 has crank arm 114- fixed thereto for engagement bycrank pin 95 whereby rotation of gear 93 and drum 94' rotates shaft 113through the engagement of' pin 95 with crank arm 114; Pulley 115 isfixedto the outer end of shaft 113. v

The ribbon breaking drive for the yarn traversing mechanism operatesinthe following manner. Shaft 71 is rotated by spindle 31 actingthrough-pulleys 67, 68, belt 69, shaft 66 and gears 72 and 73; Shaft 71by means of gear 83' rotates, gear SW-and shaft 35. Gear 84 rotates geara 103, and gear 103 operating through gears 105, 106 and 109 rotatesshaft 198. Shaft 85 carries gear 89 which actingthrough gears 91, 92 and93 rotates crank pin 95, and crank pin 95 acting through link 111 rocksthe framework composed. of segments 93' and 99 and gears 103, 1116 and109 carried thereby. Itwill, therefore, be seen that the rockingmovement of segments 98 and 99 will cause shaft 108 and pulley 110carried therehyto rotate at increasing anddecreasing speeds so that atraverse mechanism driven by said pulley 110 will operate at anon-uniform rate of speed 'to break ribbons in the manner wellknown inthe art.

A multi-groove, traverse cam, not shown,.of a type well known in the artis journaled in housing 119, Figs. 2, 3 and. 4, secured to theuppersurface of. frame 56 and reciprocates yarn guide 118 in a manner wellknown in the art. A package driving roll 12% is rotatably journaled on"a shaft 122 carried by a pair of spaced lugs 121 carried by housing119. Pulley 123 is fixed to drive roll adjacent one end thereof andbetween said roll and its adjacent lug, 121. Sprocket belt 124 connectspulley 74 and pulley 123" so that rotation of shaft 71 will rotatepackage driving roll 124i. Pulley 125 is fixed to shaft 126., bymeansofwhich the multiagroove traverse cam is mounted in housing119, andpulley 110 and 125 are connected by means of. sprocket belt 127 so thatrotation of pulley 111), in the above. described manner, will rotatesaid traverse, cam to-reciprocate guide. 118.

A hanger, for thewinding package of yarn, comprisinga pair of arms 131)and 131 is pivotally secured to bracket 132 upstanding from housing 119by .means of pivot pin 133. Ann 131 is arranged for manual slidingmovement, on pin 133, away from arm to permit the insertion and removalof package core 135 between said :arms. The free end of arm 131 hasflanged disc 134 rotatably secured thereon. The diameter-of disc .134 issuch that. it willsnugly fit Within one end of package core 1355. Wasteroll 137 is, rotatably carried by the free end of arm 130. The. innermost end of waste roll 137 is .of a diameter to snugly fit within thebore of package. core 135 -to cooperatewith flange disc 13.4 torotatably mount said packagecore for engagement with the periphery ofdriving roll 120 which will rotate it to wind n package yarn thereon.Anannular. groove. 138 is. provided in the periphery of Waste roll 137.betweenits package core engaging end and its end adjacent arm 1311,- toreceive and store the initial run. of yarnpassing into the spindle ofthepresent invention.until suchtime as the spindle is up to itspredetermined desired. speed.

An upstandingbracket 140, Figs. 3 and 11, having a bifurcated upper-endis. secured to housing 119 between pulley 12.5 andpackage .driving roll120. Auxiliary yarn guide 141 is journaled in the upper end of bracketand has pulley 142 fixedly secured thereto and located in thebifurcation in. said bracket. A thread or helix 143 is located on thesurface of auxiliary guide 141, adjacent bracket 140 and in substantialalignment withannular groove 138 in' waste roll 137'. A yarn engagingpin 144 projects from the surface of auxiliany guide 141 a shortdistance from the end of thread or helix 143 and inalignmentwith the endportion of packagecore13'5 towind a transfer-tail adjacent theend ofsaid core before" the winding of the package is started. Auxiliary yarnguide 1541 isrotated by means of beltl45 which connects pulleys 115 and142.

The base of frame 56 is provided with an opening in alignment with thebore in spindle 31. A tube 149 having a slot 150 formed therein, seeFigs. 2, 5 and 9, has one of its ends fixed in said openingnand'extendsupwardly at an angle to place its other end adjacent annular groove 138in waste roll 137. The end of slotted tube 149 ad jacent waste roll 137'is provided with a curved lip 151 to direct a strand of yarn passingthrough said tube during the threading operation against the peripheryof said waste roll.

A source of compressed air is connected to the lower end of spindle 31bymeans of conduit 152, see Fig. 1, which. is provided with a valve 153. Afoot pedal 154 is pivotally secured to framework 13 and has upstandingfinger 155 secured thereto in. a. position to engage and open valve 153when it is depressed by the machine operator. Upst-anding finger 155also functions to engage electrical switch .156 to close said switch andcomplete an electrical circuit to energize motor and solenoid 159 for a.purpose to. be explained more in detail hereinafter.

It will be seenthat the structure thus far described" operates in thefollowing manner. Whenit is desired to start and threadthe. mechanismfoot pedal I54 is depressed to cause a blastxofairto pass from conduit152 through the bore of spindle 31" and'up slotted tube 149, and therunning strand of yarn Y ispassed downwardly through guide eye 15;located above and in axial' alignment with spindle 31,.and is broughtadjacent the end of radial bore 43 in flyer 40. The stream of airpassing through spindle 3'1 creates a suction in. radial. bore 43 thatdraws the running strandof yarn into the bore of spindle 31 where it ispicked'up by the moving stream ofair and carried up the spindle bore,through. slotted tube 149'and' impinged against the periphery of wasteroll 1'37'111 annular groove 138. Waste roll137is rotated by packagecore 135 which in turn is rotated by reason of'its engagement withdriving I011 120 andlthe running strand of yarn catches on said wasteroll and is wound thereon. Driving roll. 120 is rotated, prior tothe.starting of motor 30, by means to be described hereinafter. As soon.as the running strand of yarn is caught by waste roll 137 switchS isclosedto start motor 30'to rotate flyer 4i), pulley 68 and, through belt69, pulley 67. As flyer 40 rotates it swings strand Y, as it approachessaid flyer, in aballoon orbit that surrounds or encloses supportingplatform 46, and all of the components carried thereby, to insert twoturns of twist in said strand. for each revolutionof said flyer in themanner well known in the art. As the yarn leaves slotted .tube 149. itpasses over auxiliary yarn guide 141 and is engaged'by the thread orhelix 143 which guides the running strand into annulargroove 133.Rotation of auxiliary guide 141 causes helix 143 to traverse the run.-ning strand of .yarn to the left as viewedin Figs. 4 and 11. The speedat which auxiliary guide 141 is rotated is such that the yarn isretained by helix 143 until flyer 40 has come up to its predetermineddesired speed and is inserting the predetermined desired number of turnsoftwist into. said. strand. After the running strand leaves helix 143 itslides along" auxiliary guide 141, due to-the tension in the strand,untilit engages pin 144 which retains the strand for an intervalsufiicient to permit a transfer-tail to be wound adjacentthe endofpackage core 135 whereuponcontinued rotation ofsaid guide 141 causessaidpin to disengage the running strand to. permitwthe;

tension in the strand to move it to the left drawing it out of slot 150in tube 149. As the strand emerges from slot 150 it is engaged byreciprocating yarn guide 118 which on its next traverse to the leftdraws said strand completely free of auxiliary guide 141, brings it intoengagement with fingers 79 and 80 of godet wheel 78 and continues withthe winding of the pockage. It will be appreciated that annular groove138 in waste roll 137 can be lined with a pile fabric or with teeth orwire hooks to snag or catch the end of yarn Y when it is first blownthereagainst by slotted tube 149.

Means are provided for driving package driving roll 120, traverse guide118 and auxiliary yarn guide 141 at a speed sufiicient to wind strand ofyarn Y at the speed at which it is being advanced until such time asmotor 34) attains its normal operating speed and can take over thewinding operation. This starting, or auxiliary, drive, Figs. 2 and 12,comprises starting motor 160, drivingly coupled to package driving roll120, multigroove traverse cam and auxiliary yarn guide 141 by means of amagnetic coupling that permits flyer 40 to pass between said motor 160and the above-mentioned components driven thereby. Motor 168 is mountedin housing 158 which in turn is secured by means of bracket 161 to motormounting flange 34. A stud 162 is fixed in motor mounting flange 34 inaxial alignment with vertical shaft 66 and rotatably carries pulley 163on its upper end. Pulley 163 is rotated by motor 166 by means of motorpulley 164 and belt 165. A permanent magnet 166 is fixed to the uppersurface of pulley 163 and rotates therewith. Permanent magnet 167 isfixed to the lower end of vertical shaft 66 by means of disc 168. Whenmotor 160 is energized to rotate magnet 166 the lines of force from thatmagnet pass through flyer 40 and cooperate with the lines of force frommagnet 167 to rotate shaft 66, and shaft 66 in the above describedmanner, rotates pulleys 74, 110 and 115 which in turn rotaterespectively driving roll 120, reciprocating yarn guide 118 andauxiliary yarn guide 141. Inasmuch as motor 160 is not required to driveflyer 48 it comes up to speed in a very short interval of time so thatby the time strand of yarn Y reaches waste roll 137 driving roll 120 isrotating package core 135 and said waste roll at the speed necessary towind said strand of yarn.

Pulley 67, by means of which vertical shaft 66 is normally driven frommotor 30, is connected to said shaft 66 by an over-running clutch 170.Clutch 171) may be any convenient type of over-running clutch that willpermit shaft 66 to be rotated by motor 160 while motor 30 and pulley 67are at rest or are coming up to speed. However, the preferred type ofclutch disclosed comprises a collar 171 fixed to shaft 66 adjacent hub172 forming a part of pulley 67. A helical spring 173 surrounds hub 172and a portion of collar 171 and the turns of said spring 173 are of theproper hand so that when shaft 66 and collar 171 are rotated at a speedgreater than pulley 67 the helix tends to unwind to permit such rotationbut when pulley 67 attempts to rotate faster than said shaft 66, fthehelix is tightened to cause said pulley to drive said sha t.

A lever 176 is pivoted at one of its ends to bracket 177 carried byhousing 158. Intermediate its ends lever 176 is provided with an openingthrough which the shaft of motor 160 passes. A brake-surface 174 isfixed to the upper surface of lever 176 to be pressed thereby and byspring 175 against the under surface of pulley 164 to normally preventrotation of motor 160, pulley 164 and pulley 163. A solenoid 159 ismounted in housing 158 by any convenient means and has its armatureconnected to the other end of lever 176 by means of link 178. Solenoid159 is included in the circuit supplying electric current to motor 169and operates to pull lever 176 downwardly against the action of spring175, whenever current is supplied motor 160, to release brake-surface174 from pulley 164. Switch 156 is closed by foot pedal 154 to close thecircuit to motor 160 and solenoid 159 at the same time said pedalreleases a blast of air through the bore 32 of spindle 31. As soon asstrand Y has caught on waste roll 137 the operator closes switch S toenergize motor 30. After motor 30 has brought the spindle up to itsoperating speed the operator removes his foot from lever 154 to therebyshut off the flow of air through spindle 31 and de-energizes motor andsolenoid 159. As soon as motor 160 and solenoid 159 are de-energized,spring presses brake-surface 174 against pulley 164 to hold said pulleyand magnet 163 against rotation. After magnet 166 is stopped and,therefore, out of phase with magnet 167, the magnetic flux from said twomagnets places very little load or drag on motor 30 and magnet 167 willcontinue to rotate with vertical shaft 66 throughout the entire twistingand winding cycle. It will be understood that magnet 167 and disc 168can be coupled to shaft 66 through a second over-running clutch if it isdesired to prevent the rotation of said magnet 167 when shaft 66 isrotated by motor 30. It will also be understood that switch 156 can beprovided with a time delay mechanism, of a type well known in the art,so that lever 154 can be released as soon as the strand of yarn iscaught by waste roll 137 to thereby stop the flow of air through spindle31. In such event the time delay mechanism will keep the circuit tomotor 160 and solenoid 159 closed for a predetermined time intervalsufficient for motor 30 to reach its operating speed.

Motor speed control mechanism 26 comprises a support member 179, Figs. 1and 2, that includes a plate 180 secured to lower end of motor 30 bymeans of screws 181. A combined guard and supporting element 182 issupported by plate 180 and spaced therefrom by means of bosses 183.Motor shaft or spindle 31 extends through plate 181) and terminatesadjacent guard and supporting element 182 which holds the end of conduit152 in alignment with, and closely adjacent to the bore in said shaft orspindle. A non-magnetic metallic disc 185, preferably copper, is fixedto shaft or spindle 31 adjacent its lower end. Horseshoe magnet 186 iscarried by one end of an arm 187, formed of nonmagnetic material, bymeans of yoke 184 and screw 192. The other end of arm 187 is fixedlysecured to vertical shaft 188 that is journaled in supporting element182 so that rocking movement of shaft 188 will pivot arm 187 to causethe poles of magnet 186 to pass over and under disc to varying degrees.Arm 187 can be secured to vertical shaft 188 in any convenient manner,however, it is preferably secured thereto by bending the end of said armback upon itself to form a yoke 189 having aligned openings therein topass over said shaft 188. A second yoke 190 also having aligned holes toreceive shaft 188 is positioned between the legs of yoke 189 and iscaused to grip said shaft 188 by screw 191 which passes through yoke 189and threadedly engages yoke 190.

Shaft 188 is bent at 90 degrees beneath supporting .element 182 toprovide a horizontal length or crank arm 193 beneath said supportingelement 182. Flexible tape 25 passes around segment 194, pivotallysecured to supporting element 182, and has its end secured to the end ofhorizontal length 193. A tension spring 195 has one of its ends alsosecured to the end of said horizontal length and its other end securedto a bracket member 196 carried, by supporting element 182.

As previously explained fluctuations in the tension in strand of yarn Ywill cause compensator arm 23 to pivot, i. e. an increase in tensionwill cause it to pivot in a counterclockwise direction as viewed in Fig.1 and a decreasing in tension will permit spring 195 acting throughflexible tape 25 to rotate it in a clockwise direction. Counterclockwisemovement of compensator arm 23, acting through flexible tape 25,horizontal length 193 and shaft 188 moves magnet 186 around metallicdisc 185 whereupon the eddy currents generated by the disc passingthrough the magnetic field of said magnet exert a re: tarding force onmotor 30 and slow it down to thereby reduce the winding speed of themechanism and the tension in the running strand of yarn Y. Conversely areduction in the tension in strand of yarn Y permits compensator arm 23to move in a clockwise direction thus causing magnet 186 to move awayfrom disc 185 whereupon the reduced magnetic field brings about areduction in the eddy currents generated and a consequent lowering inthe braking effect applied to motor 30 thus permitting the motor tospeed up and thereby wind the yarn at a faster rate and thus increasethe tension in strand of yarn Y.

Since certain changes may be made in the above apparatus withoutdeparting from the scope of the invention herein involved, it isintended that all matter contained in the above description or shown inthe accompanying drawings shall be interpreted as illustrative and notin a limiting sense.

What is claimed is:

1. A device for twisting and winding yarn comprising a rotatablespindle, said spindle having an opening therein forming a passageway forsaid yarn, a supporting member mounted on said spindle, means forholding said supporting member against rotation by said spindle, meansmounted on said supporting member for holding a winding package of yarn,package rotating means carried by said member, a source of power foractuating said package rotating means and rotating said spindle to causesaid spindle to rotate a strand of yarn entering said opening in anorbit that surrounds said supporting member, said package holding means,and said package rotating means, and a second source of power foractuating said package rotating means until said first mentioned sourceof power is running at its predetermined operating speed.

2. A device for twisting and winding yarn as set forth in claim 1wherein said second source of power is located outside of said orbit.

3. A device for twisting and winding yarn as set forth in claim 2including a magnetic coupling connecting said second source of power tosaid package rotating means.

4. A device for twisting and winding yarn comprising a rotatablespindle, said spindle having an opening therein forming a passageway forsaid yarn, a supporting member mounted on said spindle, means forholding said supporting member against rotation by said spindle, meansmounted on said supporting member for holding a winding package of yarn,package rotating means carried by said member, a shaft for driving saidpackage rotating means, a magnet fixed to said shaft, a second magnetspaced from said first mentioned magnet, means to rotate said secondmagnet whereby said first mentioned magnet and said shaft are rotated, asource of power for rotating said spindle to cause said spindle torotate a strand of yarn entering said opening in an orbit that surroundssaid supporting member, said package holding means, said packagerotating means, said shaft, and said first mentioned magnet and passesbetween said first mentioned magnet and said second magnet.

5. A device for twisting and winding yarn as set forth in claim 2 havingyarn traversing means mounted on said supporting member and actuated bysaid second source of power.

6. A device for twisting and winding yarn as set forth in claim 4provided with means permitting said source of power to take over therotation of said shaft when said source of power for rotating saidspindle is at a predetermined desired speed.

7. A device for twisting and winding yarn as set forth in claim 6wherein said means permitting said source of power to take over therotation of said shaft in an overrunning clutch.

8. A device for twisting and winding yarn as set forth in claim 6provided with means to stop the rotation of said second magnet aftersaid source of power takes over the rotation of said shaft.

9. A device for twisting and winding yarn comprising a rotatablespindle, said spindle having an opening therein forming a passageway forsaid yarn, a supporting member mounted on said spindle, means forholding said supporting member against rotation by said spindle, meansmounted on said supporting member for holding a winding package of yarn,package rotating means carried by said member, a source of power forrotating said spindle to cause said spindle to rotate a strand of yarnentering said opening in an orbit that surrounds said supporting member,said package holding means, and said package rotating means, a secondsource of power located outside of said orbit for actuating said packagerotating means, and means whereby said first mentioned source of powercan actuate said package rotating means when said first mentioned sourceof power is rotating said spindle at a predetermined desired speed.

References Cited in the file of this patent UNITED STATES PATENTS1,907,530 Felier May 9, 1933 2,254,895 Johnston Sept. 2, 1941 2,505,050Kimball Apr. 25, 1950 2,585,584 Pollock Feb. 12, 1952 2,625,334 Ewing etal. Jan. 13, 1953

